diff -r b166c6f49719 -r c681a3a6cbac java/ObrazkovyApplet/src/cz/frantovo/obrazkovyApplet/ObrazkovyApplet.java
--- a/java/ObrazkovyApplet/src/cz/frantovo/obrazkovyApplet/ObrazkovyApplet.java	Mon Mar 14 21:54:03 2011 +0100
+++ b/java/ObrazkovyApplet/src/cz/frantovo/obrazkovyApplet/ObrazkovyApplet.java	Sat Jun 22 16:00:39 2013 +0200
@@ -1,12 +1,11 @@
 package cz.frantovo.obrazkovyApplet;
 
+import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Graphics;
-import java.awt.Graphics2D;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;
-import java.awt.image.BufferedImage;
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
@@ -18,6 +17,9 @@
 import javax.swing.UIManager;
 import javax.swing.UIManager.LookAndFeelInfo;
 
+/**
+ * @author František Kučera, podnik.frantovo.cz
+ */
 public class ObrazkovyApplet extends javax.swing.JApplet implements MouseMotionListener, MouseListener {
 
 	private static final Logger log = Logger.getLogger(ObrazkovyApplet.class.getSimpleName());
@@ -25,9 +27,7 @@
 	private int stareX;
 	private int stareY;
 	private boolean kresli;
-	private Graphics g;
-	private Graphics2D vystupniGrafika;
-	private BufferedImage obrazek;
+	private Platno platno;
 
 	private void odesliData() {
 		try {
@@ -36,7 +36,7 @@
 			spojeni.setDoOutput(true);
 			spojeni.connect();
 			OutputStream os = spojeni.getOutputStream();
-			ImageIO.write(obrazek, "png", os);
+			ImageIO.write(platno.getObrazek(), "png", os);
 			os.flush();
 			os.close();
 
@@ -52,8 +52,8 @@
 	}
 
 	private void smazGrafiku() {
-		getVystupniGrafika().clearRect(0, 0, platno.getWidth(), platno.getHeight());
-		g.clearRect(0, 0, platno.getWidth(), platno.getHeight());
+		platno.getObrazek().getGraphics().fillRect(0, 0, panel.getWidth(), panel.getHeight());
+		platno.repaint();
 	}
 
 	public void mouseDragged(MouseEvent e) {
@@ -62,14 +62,12 @@
 
 		if (kresli) {
 			vypisStav("kreslím: " + stareX + "x" + stareY + "→" + x + "x" + y);
-			g = platno.getGraphics();
+
+			Graphics g = platno.getObrazek().getGraphics();
 			g.setColor(Color.BLUE);
 			g.drawLine(stareX, stareY, x, y);
 
-			platno.pa
-
-			
-			getVystupniGrafika().drawLine(stareX, stareY, x, y);
+			platno.repaint();
 		}
 
 		stareX = x;
@@ -99,19 +97,6 @@
 		kresli = false;
 	}
 
-	private Graphics2D getVystupniGrafika() {
-		if (obrazek == null) {
-			obrazek = new BufferedImage(platno.getWidth(), platno.getHeight(), BufferedImage.TYPE_INT_RGB);
-		}
-		if (vystupniGrafika == null) {
-			vystupniGrafika = obrazek.createGraphics();
-			vystupniGrafika.setBackground(Color.WHITE);
-			vystupniGrafika.setColor(Color.BLUE);
-			vystupniGrafika.clearRect(0, 0, platno.getWidth(), platno.getHeight());
-		}
-		return vystupniGrafika;
-	}
-
 	@Override
 	public void init() {
 
@@ -131,7 +116,11 @@
 			java.awt.EventQueue.invokeAndWait(new Runnable() {
 
 				public void run() {
+					platno = new Platno();
+					platno.repaint();
 					initComponents();
+					panel.setLayout(new BorderLayout());
+					panel.add(platno, BorderLayout.CENTER);
 				}
 			});
 		} catch (Exception e) {
@@ -139,8 +128,8 @@
 		}
 
 		/** Nastavení plátna */
-		platno.addMouseMotionListener(ObrazkovyApplet.this);
-		platno.addMouseListener(ObrazkovyApplet.this);
+		panel.addMouseMotionListener(ObrazkovyApplet.this);
+		panel.addMouseListener(ObrazkovyApplet.this);
 		log.log(Level.INFO, "plátno nastaveno");
 	}
 
@@ -150,7 +139,7 @@
 
         odeslat = new javax.swing.JButton();
         stavovyRadek = new javax.swing.JLabel();
-        platno = new javax.swing.JPanel();
+        panel = new javax.swing.JPanel();
 
         odeslat.setText("Odeslat na server");
         odeslat.addActionListener(new java.awt.event.ActionListener() {
@@ -161,16 +150,14 @@
 
         stavovyRadek.setText(" ");
 
-        platno.setDoubleBuffered(true);
-
-        javax.swing.GroupLayout platnoLayout = new javax.swing.GroupLayout(platno);
-        platno.setLayout(platnoLayout);
-        platnoLayout.setHorizontalGroup(
-            platnoLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        javax.swing.GroupLayout panelLayout = new javax.swing.GroupLayout(panel);
+        panel.setLayout(panelLayout);
+        panelLayout.setHorizontalGroup(
+            panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGap(0, 388, Short.MAX_VALUE)
         );
-        platnoLayout.setVerticalGroup(
-            platnoLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        panelLayout.setVerticalGroup(
+            panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGap(0, 255, Short.MAX_VALUE)
         );
 
@@ -181,7 +168,7 @@
             .addGroup(layout.createSequentialGroup()
                 .addContainerGap()
                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-                    .addComponent(platno, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                    .addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                     .addGroup(layout.createSequentialGroup()
                         .addComponent(stavovyRadek, javax.swing.GroupLayout.DEFAULT_SIZE, 243, Short.MAX_VALUE)
                         .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
@@ -192,7 +179,7 @@
             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                 .addContainerGap()
-                .addComponent(platno, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                     .addComponent(odeslat)
@@ -210,7 +197,7 @@
 	}
     // Variables declaration - do not modify//GEN-BEGIN:variables
     private javax.swing.JButton odeslat;
-    private javax.swing.JPanel platno;
+    private javax.swing.JPanel panel;
     private javax.swing.JLabel stavovyRadek;
     // End of variables declaration//GEN-END:variables
 }